Protective effect of conditioner agents on hair treated with oxidative hair dye

Gama, Robson Miranda da; França-Stefoni, Simone Aparecida; Sá-Dias, Tânia C; Bedin, Valcinir; Baby, André Rolim; Velasco, Maria Valéria Robles

doi:10.1111/jocd.12484

Cited by 8 publications

(13 citation statements)

References 18 publications

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“…Dias‐stron ® MTT175 operational parameters were set to the following: force range of 2000 g ; combing speed of 120 mm/min. Five trials were performed on each tress, obtaining the average total combing work …”

Section: Methodsmentioning

confidence: 99%

“…Fibres diameters were determined with the micrometre Mitutoyo ® , in three positions, and the mean value was used to calculate the cross‐sectional area of the hair fibre. The tensile strength was obtained by the ratio between the cross‐sectional area and the break load …”

Section: Methodsmentioning

confidence: 99%

“…Five trials were performed on each tress, obtaining the average total combing work. 17,18 Mechanical properties Stress-strain curves were obtained with Dia-stron â MTT 175 at room temperature (22.0 AE 2.0°C) and 65% RH. Twenty fibres were randomly selected and crimped using two brass tabs.…”

Section: Evaluation Of Hair Tressesmentioning

confidence: 99%

“…The tensile strength was obtained by the ratio between the cross-sectional area and the break load. 18 Colour changes The colour was determined in the Evolution 600 â UV/Vis spectrophotometer (Thermo Fischer Scientific, Waltham, MA, USA), equipped with DRA-EV-600 Diffuse Reflectance accessory, and the CIE Lab values were obtained using a VISIONlite colorCalc software. The measurements were performed in triplicate in the middle of each strand.…”

Section: Evaluation Of Hair Tressesmentioning

confidence: 99%

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Chemical and physical treatments damage Caucasian and Afro‐ethnic hair fibre: analytical and image assays

Bloch

Goshiyama

Dario

et al. 2019

Acad Dermatol Venereol

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Background Sensory and structural characteristics of hair can be modified by chemical and physical treatments, as dyeing, brushing, but also by external factors, as sunlight radiation. However, quantitative data relating damage to the degree of hair curliness and treatments are missing. Objective To evaluate the effect of chemical and physical treatments on different types of hair. Methods In this study, we compared the effects of bleaching/dyeing, thioglycolate‐based straightening, brushing/flat iron and UVA/Vis radiation on different types of hair: Caucasian (straight dark brown, straight blond, wavy dark brown and curly dark brown) and Afro‐ethnic hair. Results Bleaching/dyeing and UVA/Vis radiation increased combing work of Afro‐ethnic hair tresses, indicating damage to the cuticle scales, which was confirmed by SEM images. Further, bleaching/dyeing caused wear on cuticles with high protein loss and reduction on the tryptophan content, independently of the hair curliness, which characterizes those procedures as very aggressive to hair structure. Straightening using ammonium thioglycolate, due to the oxidative treatment evolved, caused significant colour fading in brown/black tresses, while UVA/Vis radiation affected the colour of only blond hair tresses since they are poor in eumelanin, the photoprotective and photostable melanin molecule. Conclusion The combination of analytical and image techniques contributed to understanding how the hair shape is related to the type of damage caused by several chemical and physical treatments. These findings contribute to the development of safety cosmetics that insure the beauty of curly hair, both Caucasian and Afro‐ethnic hair.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Evaluation Of Hair Tressesmentioning

confidence: 99%

Section: Evaluation Of Hair Tressesmentioning

confidence: 99%

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Chemical and physical treatments damage Caucasian and Afro‐ethnic hair fibre: analytical and image assays

Bloch

Goshiyama

Dario

et al. 2019

Acad Dermatol Venereol

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“…The protein loss analysis (PLA) has been used in several evaluation studies of hair damage. [] Among them, Da Gama et al evaluated the protective effect of conditioner agents on hair treated with oxidative hair dye by PLA. The authors verified that the incorporation of conditioner agents into blond color emulsion decreased the damage caused by the coloring process.…”

Section: Introductionmentioning

confidence: 99%

Heat‐damaged evaluation of virgin hair

Lima

Couto

Freire

et al. 2019

J of Cosmetic Dermatology

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Summary Background Hair‐straightening treatments may involve the use of thermal devices, which potentially cause damages in the cuticle and cortex of the hair fibers. Particularly, the heat causes denaturation of the α‐keratin and the degradation of the components of the hair cortex. Objectives The aim of this study was to evaluate the effect of heating on the cuticle and cortex of the Caucasian and Asian virgin hair by using heat iron flat. Methods The effects of the heating in the tresses of Caucasian and Asian virgin hair were analyzed by thermogravimetry/differential scanning calorimetry‐Fourier transform infrared/mass spectrometry (TG/DSC‐MS/FTIR), protein loss analysis (PLA), Fourier transform infrared (FTIR‐ATR), and scanning electron microscope (SEM). Results TG/DSC‐MS/FTIR results were: formation of the H2O between 25‐170°C and CO2, SCO and H2S from 200°C. Denaturation temperature = 237°C. Protein loss: Asian hair>Caucasian hair. Data presented statistically significant alterations, α = 5, P ≤ 0.05, n = 3. FTIR‐ATR: changes in the secondary structural conformation of the protein of hair cuticle. SEM: heat caused damage to hair cuticle. Conclusions The results evidenced the importance of the control of temperature in the procedures involving heat. The damage caused by thermal devices showed be dependent of the ethnicity analyzed (Caucasian and Asian hair).

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Incorporation of doxylamine and N‐doxylamine‐oxide in human hair and the impact of a permanent oxidative hair dye

Fernández

Wille

Samyn

2022

Drug Testing and Analysis

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Knowledge of the drug incorporation in hair and impact of cosmetic treatments remains essential to correctly interpret forensic cases. The study shows the analysis of doxylamine and doxylamine‐N‐oxide and the evaluation of the relationship between dose and hair concentration and the impact of hair treatment (oxidative dying). The study included (A) three subjects participated to the study: a regular user (Subject 1) and two single‐dose users (Subject 2, 1 single dose; and Subject 3, 2 single doses spaced 5 months apart). Subject 3 applied a permanent oxidative hair dying monthly. (B) A permanent oxidative hair dying was applied twice to the hair collected from Subject 2. (A) The average concentrations in head hair for doxylamine and its N‐doxylamine‐oxide, respectively, were as follows: Subject 1, 1825 pg/mg and 16 pg/mg; Subject 2, 182 and <limit of quantification (LOQ); and Subject 3, Strand 1 (1 month after last single dose]; 1st cm: 367 pg/mg and 22 pg/mg; 2nd cm: 664 pg/mg and 37 pg/mg; 3rd cm 108 pg/mg and 13 pg/mg; 4th cm 13 pg/mg and 7 pg/mg); Strand 2 (5 months after last single dose: <LOQ). (B) The oxidative hair dying increased the concentration of the metabolite from undetected <LOQ up to 79 pg/mg (n = 3, RSD 6%). The concentration of the parent drug decreased from 128 pg/mg to 40 pg/mg (n = 3, RSD 4%). This is the first time the incorporation of doxylamine and its metabolite was evaluated with adequate and controlled information concerning dose and timing of ingestion for the evaluation of their incorporation and the impact of a cosmetic treatment.

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Protective effect of conditioner agents on hair treated with oxidative hair dye

Abstract: Based on these results, the incorporation of conditioner agents into emulsion blond color decreased the damage caused by the coloring process.

Cited by 8 publications

References 18 publications

Chemical and physical treatments damage Caucasian and Afro‐ethnic hair fibre: analytical and image assays

Chemical and physical treatments damage Caucasian and Afro‐ethnic hair fibre: analytical and image assays

Heat‐damaged evaluation of virgin hair

Incorporation of doxylamine and N‐doxylamine‐oxide in human hair and the impact of a permanent oxidative hair dye

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